The video shows a cage with several mice inside. The cage is made of glass, and the bottom is covered in wood shavings. There is a two-level wooden structure inside the cage, providing the mice with a place to climb and hide. The mice are of various colors, including black, brown, and gray. Some of the mice are sleeping or resting on the shelves of the wooden structure, while others are moving around. There is a small blue plastic toy and a few pieces of food scattered around the cage. The overall impression is that the mice are living in a contained environment, possibly at a pet store or a breeding facility.